These ducts are fully symmetric around in the cylinder, so the gasses can flow into the 4 exhaustpipes very fast. After burning the gasses, when the piston goes down, the 4 exhaustducts opens first at the same time and the burned gasses leaves the cylinder.
The whole scavenging will proceed in a symmetric way. Symmetric is one part to explain the system, but most important is the 100% Time Area. Althought this system should produce more power than the current way, it still is the question, if in practice this will be prooven Who would be the first realising the idea in a working prototype is another question. That's why I like to introduce you the "Foekema Symmetric Two-stroke" (FST) But because in the current circumstances, I can't wait to explain my new system. The only thing I did was an announcement on the site, but without an explenation. Till sofare I didn't want to spend time for this because there are many more important things to do when you wanted to be the fastest 50cc sprinter in the world on the 150 meter and the 1/4 mile. That is why I thought that someone else already did the same in the past. Many things in two-stroke tuning has been made since the beginning of the two stroke. The idea is not very difficult, but realising ideas like this is not that easy, because it has to be made very precisely. May be it is different, than we will have 2 new systems at almost the same time. Lucky for me he didn't explain the system, otherwise he would be the first. When reading, I thought: "I'm not sure, but it could be the same". Frits Overmars also got a new idea, which he called the FOS system. It was not my intention to announce this new idea before making and testing it, but I was supprised when reading the magazine of Kickstart of january this year. So to me it came about two years ago, and that is the Foekema Symmetric Twostroke (FST). But thinking to get more power you automaticly come to new ideas. The current way of scavenging exist almost from the beginnng of the 2-stroke history and never changed, unless the many other systems which had been founded. FST date of announcement January 19th 2008Ībout 2 years ago I got the idea to change the way of scavenging of the twostroke engine.
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